Currently modifiers are unsupported, as mentioned here. If you need to preserve the modifiers stack, you could clone and collapse your object. When you are done setting the Smoothing Groups in this new object, you could transfer them to an Edit Poly modifier on the original object with the help of a script. That's the…
Yeah, but I found easy enough work around.. In the unwrap I have everything smoothed based on UV islands then through your poly smoother I adjust the smoothing groups back to what I considering more ideal smoothing.. Before using your script, this method was a pain because I could never easily visualize the smoothing…